Here are some promises that registry cleaner tools often make: Registry cleaners fix “registry errors” that can cause system crashes and even blue-screens. Your registry is full of junk that is “clogging” it and slowing down your PC. Registry cleaners also eliminate “corrupted” and “damaged” entries.

Once your Registry has been cleaned up, you will likely notice a performance boost and any error messages you saw whilst using your computer previously will be gone. The Registry Cleaner will remove entries for non-existent applications, and it'll also fix invalid or corrupted entries.